Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae
Adults. Head smooth. Eyes glabrous; not ciliated. Antennae of males ciliate.
Wingspan 29–36 mm. The thorax coloured like the forewings, the abdomen like the hindwings. Forewings faintly purplish, slate grey in the male, darker, purplish-fuscous to blackish in the smaller female; purplish marked or tinged; complexly patterned (with lines and short streaks); the patterning rather obscure; reniform defined; orbicular defined; claviform undefined. Hindwings whitish to whitish-fuscous, or fuscous; plain to terminally darkened; without a clear discal mark; without transverse lines; exhibiting vein 5. Vein 5 of the hindwings weak; arising nearer to vein 6 than to vein 4. Thorax slightly crested (posteriorly). Middle tibiae without spines. Posterior tibiae without spines; with appressed scales. Abdomen not crested.
Living adults found August and September.
Larvae, pupae. Larvae feeding on grasses (exclusively).
British representation. 1 species; South-east England, Central-southern England, South-west England, English Midlands, Northern England, Southern Scotland, Northern Scotland, Wales, and Ireland (local); anomala (The Anomalous).
Illustrations. • Stilbia anomalata (The Anomalous): B. Ent. 631. • Stilbia anomalata: B. Ent. 631, legend+text. • Stilbia anomalata: B. Ent. 631, text cont.. • S. anomala (The Anomalous), and 14 related genera. • Amphipyrinae (Photedes, Stilbia, Apamea, Spodoptera): Kirby.
To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. Insects of Britain and Ireland: the genera of Lepidoptera-Noctuidae. Version: 8th June 2016. delta-intkey.com’.